3x^2-18x+24=-2

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Solution for 3x^2-18x+24=-2 equation:


Simplifying
3x2 + -18x + 24 = -2

Reorder the terms:
24 + -18x + 3x2 = -2

Solving
24 + -18x + 3x2 = -2

Solving for variable 'x'.

Reorder the terms:
24 + 2 + -18x + 3x2 = -2 + 2

Combine like terms: 24 + 2 = 26
26 + -18x + 3x2 = -2 + 2

Combine like terms: -2 + 2 = 0
26 + -18x + 3x2 = 0

Begin completing the square.  Divide all terms by
3 the coefficient of the squared term: 

Divide each side by '3'.
8.666666667 + -6x + x2 = 0

Move the constant term to the right:

Add '-8.666666667' to each side of the equation.
8.666666667 + -6x + -8.666666667 + x2 = 0 + -8.666666667

Reorder the terms:
8.666666667 + -8.666666667 + -6x + x2 = 0 + -8.666666667

Combine like terms: 8.666666667 + -8.666666667 = 0.000000000
0.000000000 + -6x + x2 = 0 + -8.666666667
-6x + x2 = 0 + -8.666666667

Combine like terms: 0 + -8.666666667 = -8.666666667
-6x + x2 = -8.666666667

The x term is -6x.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6x + 9 + x2 = -8.666666667 + 9

Reorder the terms:
9 + -6x + x2 = -8.666666667 + 9

Combine like terms: -8.666666667 + 9 = 0.333333333
9 + -6x + x2 = 0.333333333

Factor a perfect square on the left side:
(x + -3)(x + -3) = 0.333333333

Calculate the square root of the right side: 0.577350269

Break this problem into two subproblems by setting 
(x + -3) equal to 0.577350269 and -0.577350269.

Subproblem 1

x + -3 = 0.577350269 Simplifying x + -3 = 0.577350269 Reorder the terms: -3 + x = 0.577350269 Solving -3 + x = 0.577350269 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = 0.577350269 + 3 Combine like terms: -3 + 3 = 0 0 + x = 0.577350269 + 3 x = 0.577350269 + 3 Combine like terms: 0.577350269 + 3 = 3.577350269 x = 3.577350269 Simplifying x = 3.577350269

Subproblem 2

x + -3 = -0.577350269 Simplifying x + -3 = -0.577350269 Reorder the terms: -3 + x = -0.577350269 Solving -3 + x = -0.577350269 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = -0.577350269 + 3 Combine like terms: -3 + 3 = 0 0 + x = -0.577350269 + 3 x = -0.577350269 + 3 Combine like terms: -0.577350269 + 3 = 2.422649731 x = 2.422649731 Simplifying x = 2.422649731

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.577350269, 2.422649731}

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